Texture Issues with glTF Export from Blender

It appears you're experiencing texture distortion when exporting your VRM model from Blender to glTF/GLB format. This is a common issue when working with models that have been imported from one format to another, especially with character models that use complex UV mappings.

Possible Causes and Solutions

1. UV Map Issues: The most likely cause is that the UV maps aren't being properly transferred during export. When exporting from Blender to glTF, make sure:

   • All UV maps are properly named and assigned
   • The primary UV map is selected as the active one before export

2. Export Settings: Check your glTF export settings in Blender:

   • Ensure "Include UV Maps" is enabled
   • Try enabling "Export Textures" option if available
   • Make sure the correct material settings are being exported

3. Material Setup: VRM materials might not translate directly to glTF:

   • Check if your materials are using nodes that are compatible with glTF
   • Simplify complex shader setups before export
   • Ensure textures are properly linked in the material nodes

4. Using GLTFExporter: If you're using Three.js to view the model, you might want to check how you're loading it. The GLTFLoader in Three.js should be used to properly load the exported model:

JAVASCRIPTCopied
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';

const loader = new GLTFLoader();
loader.load(
    'path/to/your/model.glb',
    function (gltf) {
        scene.add(gltf.scene);
        // Model is loaded and added to the scene
    },
    function (xhr) {
        console.log((xhr.loaded / xhr.total * 100) + '% loaded');
    },
    function (error) {
        console.error('An error happened', error);
    }
);

5. VRM to glTF Workflow: Consider using a direct VRM to Three.js workflow instead:
   • Three.js has a VRMLoader extension that might handle the model better
   • Or try using the official VRM converter tools before importing to Blender

If you need more specific help, you might want to share your Blender export settings and how you're loading the model in Three.js.